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Thread: Wireless does not work Broadcom BCM57785

  1. #1
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    Wireless does not work Broadcom BCM57785

    Hello, I have a notebook Acer Aspire E1-531 with a Broadcom Card BCM57785, and today after some upgrades which I don't remember what it was and a reboot, the computer lost all wireless connection. Even though I can connect on a wired connection.

    Here is some info:

    • Distribution; Ubuntu 12.04 LTS
    • Kernel Version: 3.2.0-56-generic
    • iwconfig does not show wireless interfaces
    • The module tg3 is loaded
    • rfkill does not throw any output
    • I have installed: bcmwl-kernel-source


    Attached is the output of all commands!

    I will really appreciate if someone can give me hand on this. I'm realy stuck and I have tried thousand things already!
    Attached Files Attached Files

  2. #2
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    Re: Wireless does not work Broadcom BCM57785

    Your data only includes Broadcom Corporation NetLink BCM57785 Gigabit Ethernet PCIe which is, as the name implies, an ethernet card, not wireless. Please show us:
    Code:
    lspci -nn | grep 0280
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  3. #3
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    Re: Wireless does not work Broadcom BCM57785

    Sorry about that! Here is the output:

    Code:
    lspci -nn | grep 0280
    03:00.0 Network controller [0280]: Broadcom Corporation BCM4313 802.11bgn Wireless Network Adapter [14e4:4727] (rev 01)

  4. #4
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    Re: Wireless does not work Broadcom BCM57785

    Ahhh! A controversial device to get going. We may have some tweaking to do. Let's start with:
    Code:
    sudo modprobe wl
    dmesg | grep wl
    iwconfig
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  5. #5
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    Re: Wireless does not work Broadcom BCM57785

    hehe Don't tell me about it! It's eating my brain!

    Here is the output:
    Code:
    root@magnets:~# modprobe wl
    root@magnets:~# dmesg | grep wl
    [   21.731586] wl: module license 'MIXED/Proprietary' taints kernel.
     [   21.736682] wl 0000:03:00.0: PCI INT A -> GSI 17 (level, low) -> IRQ 17
    [   21.736691] wl 0000:03:00.0: setting latency timer to 64
    [   21.774905] INFO @wl_cfg80211_attach : Registered CFG80211 phy
    root@magnets:~# iwconfig 
     lo        no wireless extensions.
    
    
    eth1      IEEE 802.11abg  ESSID:off/any  
              Mode:Managed  Access Point: Not-Associated   Tx-Power=off   
              Retry  long limit:7   RTS thr:off   Fragment thr:off
               Encryption key:off
              Power Management:off
    
    
              
    eth0      no wireless extensions.
    
    root@magnets:~#

  6. #6
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    Re: Wireless does not work Broadcom BCM57785

    Looks pretty normal so far; let's dig deeper:
    Code:
    rfkill list all
    sudo iwlist eth1 scan
    Running as root, are we? Tsk, tsk!
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  7. #7
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    Re: Wireless does not work Broadcom BCM57785

    hehe, you're right

    Here:

    Code:
    volkan@magnets:~$ rfkill list all
    0: phy0: Wireless LAN
        Soft blocked: yes
        Hard blocked: no
    1: brcmwl-0: Wireless LAN
         Soft blocked: yes
        Hard blocked: no
    volkan@magnets:~$ sudo iwlist eth1 scan
    [sudo] password for volkan: 
    eth1      Interface doesn't support scanning : Network is down
    
    volkan@magnets:~$

  8. #8
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    Re: Wireless does not work Broadcom BCM57785

    Please try:
    Code:
    sudo rfkill unblock all
    sudo iwlist eth1 scan
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

  9. #9
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    Re: Wireless does not work Broadcom BCM57785

    Hello There, sorry for the delay.

    I did what you told me and also, I downloaded the "official" driver from the broadcom page: http://www.broadcom.com/support/802.11/linux_sta.php and I ran the following commands:

    1. Remove the following modules:
    Code:
    rmmod b43
    rmmod brcmsmac
    rmmod ssb
    rmmod bcma
    rmmod wl
    2. Then, I added them to the Blacklist:
    Code:
    echo "blacklist ssb" >> /etc/modprobe.d/blacklist.conf
    echo "blacklist bcma" >> /etc/modprobe.d/blacklist.conf
    echo "blacklist b43" >> /etc/modprobe.d/blacklist.conf
    echo "blacklist brcmsmac" >> /etc/modprobe.d/blacklist.conf
    3. Install the following modules and the driver:
    Code:
    modprobe lib80211 
    modprobe cfg80211
    insmod wl.ko
    4. Then I added them to /etc/modules:
    Code:
    echo "lib80211" >> /etc/modules
    echo "cfg80211" >> /etc/modules
    echo "wl.ko" >> /etc/modules
    Then, I had to "Enable Wireless" on the Network Manager, and the wifi start working.
    I ran the scan that you told me, and the output is attached,
    scan.txt


    But now, I have a really annoying problem: The wifi connection cuts every now and then, and it's really getting me mad. I'm always doing something on the web and suddenly the connection cuts, and it's kind of happening more often than I would like. Any ideas of what can be the problem?

  10. #10
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    Re: Wireless does not work Broadcom BCM57785

    4. Then I added them to /etc/modules:
    Code:

    echo "lib80211" >> /etc/modules
    echo "cfg80211" >> /etc/modules
    echo "wl.ko" >> /etc/modules
    First,the terminology is wl and not wl.ko. Second, I hope you don't actually have quotation marks around these, they are not needed. Check:
    Code:
    cat /etc/modules
    Last, please run:
    Code:
    modinfo wl | grep depends
    Is cfg80211 a dependency of wl? Is it a dependency of lib80211? I don't know for sure because I haven't compiled the downloaded version. I doubt it is the superior of the Ubuntu version available in the repositories. Time will tell.

    Depending on your findings, I suggest you adjust /etc/modules and reboot.
    "Oh, Ubuntu, you are my favorite Linux-based operating system" --Dr. Sheldon Cooper, Ph.D.

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